CN104218945A - Method for converting microwave signals into direct-current electric signals by aid of spin wave propagation - Google Patents
Method for converting microwave signals into direct-current electric signals by aid of spin wave propagation Download PDFInfo
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- CN104218945A CN104218945A CN201410424528.1A CN201410424528A CN104218945A CN 104218945 A CN104218945 A CN 104218945A CN 201410424528 A CN201410424528 A CN 201410424528A CN 104218945 A CN104218945 A CN 104218945A
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Abstract
The invention discloses a method for converting microwave signals into direct-current electric signals by the aid of spin wave propagation. The method includes steps of firstly, generating the microwave signals by the aid of microwave signal generators, and generating spin waves by the aid of planar waveguides by means of excitation; secondly, propagating the spin waves inside yttrium iron garnet YIG in a low-loss manner at high speeds; thirdly, enabling the spin waves to generate 'constructive interference' and 'destructive interference' via spin wave interference devices; fourthly, converting spin wave signals into direct-current readable voltage signals by the aid of spin wave Hall effects. The method has the advantages that the spin waves can be detected by the aid of the simple direct-current voltage signals, logic information of '1' and '0' is read and represented by high voltages and low voltages after the logic information is logically computed, and the spin waves are used as carriers of the logic information; a mode for detecting the spin waves is greatly simplified by the method as compared with the traditional means for detecting spin waves by the aid of microwaves, accordingly, the difficulty in detecting spin wave logic computation results can be lowered, and secondary heat dissipation can be prevented.
Description
[technical field]
The present invention relates to the New kind logical component based on spin wave, be specifically related to utilizing the interference of the spin wave of magnetic material to carry out in the device of logical operation, adopt direct voltage operation result to be carried out to the method directly read.The present invention is also applicable to the voltage reading extract operation of any holographic memory based on spin wave or image processing function.The invention belongs to the New kind logical component technical field in computer logic arithmetic system.
[background technology]
Logical device (Spin-wave logic device) based on spin wave a kind ofly novel utilizes spin wave (Spin wave) as the Novel electronic devices of information carrier.Along with the continuous microminiaturization of size of electronic devices, the Joule heat loss produced by device inside electric current is exponentially risen, and this not only makes energy consumption increase, and also causes negative effect to the stability of device.Based on the logical device of spin wave by carrying out the binary data 0 and 1 in characterization information memory technology respectively by 0 and π phase information of spin wave, thus carry out information transmission, and logical operation can be carried out to it.Carry out transmission information with utilizing spin polarized current to compare, the advantage of spin wave is that it produces and propagates the migration effect all not relying on charge carrier, therefore can break through the problem such as heat dissipation in microelectronic circuit, RC sluggishness.In addition, by the logical device based on spin wave is integrated with other spin electric device, can also realize based on all-electronin spin information processing, transmission with storage.
Spin wave is the spin information propagation in space caused by the precession of electron spin collective.Spin wave is also referred to as magnon (Magnon), the field that Recent study spin wave is propagated is called as magneto-electronics (Magnonics) or magneton spintronics (Magnonspintronics), is a cross discipline of modern magnetics and electronics.Be considered to break through one of important way of information transmission in the Future Information system of Moore's Law restriction based on the information transmission of spin wave and logic computing system.
Electronic device operation principle based on spin wave mainly comprises three steps: exciting of spin wave, the transmission of spin wave and the detection of spin wave.Exciting of spin wave can by the method for microwave, utilizes slab guide microwave to be converted into spin wave in magnetic material and propagates, as shown in Figure 1.The enhancing that the logic computing function of spin wave mainly utilizes the spin wave with out of phase to produce or destructive interference, when spin wave input signal phase place is " 0 ", represent binary number 0; When spin wave phase of output signal is " π ", represent binary number 1, as shown in Figure 2.Detection general microwave (GHz) means of spin wave, namely slab guide (change of the spin wave generation magnetic flux of a transmission can cause producing induced voltage around slab guide) is used, this is the process of a relative complex, and the requirement for through engineering approaches is high.Based on this, the present invention proposes a kind of spin wave that utilizes and propagate method microwave signal being converted to DC signal, greatly can reduce the complexity of spin wave detection.
[summary of the invention]
One, goal of the invention:
As mentioned above, utilize microwave means to detect spin wave technology relative complex and require high for through engineering approaches.This is a very large obstacle for the application of spin wave logical device in large scale integrated circuit.A kind of spin wave that utilizes of the present invention propagates method microwave signal being converted to DC signal, proposes a kind of method utilizing simple direct voltage to detect spin wave amplitude.Utilize strong voltage and light current pressure to read the logical message " 1 " using spin wave as carrier after logical calculated and " 0 ".Thus greatly reduce the difficulty of detection spin wave logical calculated result, and the second heat avoiding microwave sounding spin wave dissipates.
Two, technical scheme:
Spin wave propagation is the propagation of a kind of spin current (Spin current) or perhaps magneton.The present invention is based on and utilize inverse logic gates (Inverse Spin Hall effect), first spin current is converted to electric current, is then converted to d. c. voltage signal, thus complete the detection to spin wave.
Accompanying drawing 3 is in magnetic material, utilize inverse logic gates spin wave signal to be converted to principle and the implementing method of d. c. voltage signal.The spin current that spin wave causes as a kind of spin information collective vibration, can produce potential accumulations under the effect of outside magnetic field on Hall bar (Hall bar).Magnetic field B, spin wave I
s, and the voltage V detected
iSHEcan be judged by the right-hand rule, as shown in the figure.In general, Hall bar noble metal, proof gold or platinum film synthesize.Be that the spin information of carrier fails to be convened for lack of a quorum by inverse logic gates accumulated voltage on Hall bar with spin wave, this voltage signal can directly be obtained by traditional voltage measurement method, such as conventional voltage meter.
A kind of spin wave that utilizes of the present invention propagates method microwave signal being converted to DC signal, and its step is as follows:
Step one: utilize microwave signal generator to produce microwave signal, inspire spin wave through slab guide;
Step 2: spin wave carries out low-loss in YIG (yttrium iron garnet) the inside, and high speed is propagated;
Step 3: spin wave produces " constructive interference " and " destructive interference " by spin wave interferometer;
Step 4: the voltage signal utilizing spin wave Hall effect spin wave signal to be changed into direct current to can read.
Wherein, " signal generator " described in step one refers to common Commercial signal generators; " slab guide excites " is that the electromagnetic viscosimeter utilizing microwave current to produce excites the collective oscillation of spin and then produces spin wave.
Wherein, " low-loss " described in step 2 refers to that spin wave is propagated quite long distance and obviously do not decay; " high speed " refers to the group velocity of spin wave.
Wherein, the Y type design in Fig. 2 is referred at " the spin wave interferometer " described in step 3." constructive interference " refers to that spin wave amplitude superposes, and " destructive interference " refers to that spin wave amplitude is cancelled out each other.
Wherein, refer to that the inverse Hall effect of utilization produces direct current signal on Hall bar " spin wave signal changes into the voltage signal that direct current can read " described in step 4.
Three, advantage and effect
A kind of spin wave that utilizes of the present invention propagates method microwave signal being converted to DC signal, by utilizing simple d. c. voltage signal to detect spin wave, and then read the logical message " 1 " using spin wave as carrier after calculating with characterization logic and " 0 " by strong voltage and light current pressure.Compared to traditional means utilizing microwave sounding spin wave, the method simplifies the mode of detection spin wave greatly, reduces the difficulty of detection spin wave logical calculated result, and avoids second heat dissipation.
[accompanying drawing explanation]
Fig. 1 is that spin wave microwave means excites the planar waveguiding structure used.Black M shape represents the structure of the slab guide of end seal, comprising the holding wire of centre and the ground wire of both sides.Black arrow to the right represents the spin direction of wave travel excited.In figure, 1 represents slab guide, and 2 is propagation medium, and 3 is spin wave.
Fig. 2 is the carrier of spin wave interferometer as logical operation.Y-type structure representative is as the magnetic material of spin wave propagation medium.The left side is signal input, and the right side is that signal exports.Wherein the phase place of input be 0 and π represent logical message 0 and 1 respectively, the height of the level of output and lowly represent logical message 0 and 1 respectively, this device can perform " same or XNOR " logical operation of two inputs, when two inputs are all 0 or 1 time, exporting is all 1, when two inputs are different time, output is 0.In figure, 4 is input signal, and 5 is input signal, and 7 is output signal, and 8 is propagation medium, and 9 is Hall bar.
Fig. 3 and Fig. 4 is the voltage signal utilizing inverse logic gates propagated spin wave to be converted into direct current to can read.In figure, B represents magnetic direction, V
iSHErepresent inverse spin Hall voltage, I
srepresent spin wave direction, 10 represent Hall bar, and 11 represent spin wave.
Fig. 5 is the device pie graph utilizing direct voltage to detect the propagated spin wave of microwave-excitation.In figure, 12 is substrate, and 13 is slab guide, and 14 is propagation medium, and 15 is Hall bar.
Fig. 6 the method for the invention flow chart.
[embodiment]
Traditional excites with microwave mode the planar waveguiding structure used, and as shown in figures 1 to 6, wherein, Fig. 1 black M shape part is slab guide microwave being converted to spin wave, top short circuit.Centre is holding wire, and both sides are ground wire, is generally to be connected on microwave signal generator by three joint microwave probes and microwave transmission line to realize.The microwave of concussion produces the spin wave of propagability in spin wave transmission medium.Spin wave frequency, generally in the scope of 1-20GHz, has corresponding change according to different propagation mediums.
Spin wave interferometer is as the carrier of logical operation, and as shown in Figure 2, the left side is the input of logical operation, and the spin wave excitation source consistent by two frequencies is formed.The phase place 0 of spin wave and π represent 0 in logical operation and 1 respectively.When the phase difference of two spin waves is 0 time, produce constructive interference at output, and then read high voltage signal, be recorded as logical message 1.When the phase difference of two spin waves is π time, produce destructive interference at output, and then read low voltage signal, be recorded as logical message 0.Therefore, this device can perform " same or XNOR " logical operation of two inputs, and this logical operation truth table as shown in Figure 2.To perform multi input logical operation, only need corresponding increase input signal quantity.It is important to note that this device can also perform other logical operation, such as " with AND ", " or OR ", " XOR NOR " etc.
Propagated spin wave is converted into the voltage signal that direct current can read by the inverse logic gates of utilization, as shown in Figure 3-4, spin wave is propagated from left to right, externally-applied magnetic field direction is perpendicular to paper upwards, can in two ends accumulated voltage when it passes through Hall bar time, concrete vector correlation is provided by the right-hand rule.
Fig. 5 provides a kind of simple from spin wave excitation, propagates into the elemental device detected by direct methods.More complicated logical device can design more spin wave and interfere path in communication process, as shown in Figure 2, such device cell then can be realized large-scale logic computing function as array, and logical calculated result can be read by voltage signal in any position.Desirable is the magnetic insulator with low spin dissipation factor as spin wave carrier magnetic material.(as yttrium iron garnet (YIG) etc.) magnetic material is designed to edge and has the corner cut of certain angle " θ " to prevent the edge reflections of spin wave, impacts device function.Wherein table 1 input, table 2 is output, and table 3 is computing truth table (XNOR).
Specific embodiments is as follows:
A kind of spin wave that utilizes of the present invention propagates method microwave signal being converted to DC signal, and its step is as follows:
Step one: utilize microwave signal generator to produce microwave signal, inspire spin wave through slab guide.The wavelength of spin wave can be regulated by the design of slab guide.
Step 2: spin wave can be propagated in YIG (yttrium iron garnet) the inside.Propagation velocity is generally several km/s.
Step 3: spin wave is produced by spin wave interferometer interferes, and produces " constructive interference ", produce " destructive interference " time phase difference is π when the phase difference of two spin waves is 0 time.
Step 4: the voltage signal utilizing spin wave Hall effect spin wave signal to be changed into direct current to can read.
Wherein, " signal generator " described in step one refers to common Commercial signal generators, and frequency is 1-20GHz, and concrete model is Agilent N5183B such as." slab guide excites " is that the electromagnetic viscosimeter utilizing microwave current to produce excites the collective oscillation of spin and then produces spin wave." low-loss " described in step 2 refers to that spin wave is propagated quite long distance and obviously do not decay.The effective propagation distance of spin wave in YIG material is mm magnitude." high speed " refers to the group velocity of spin wave, can reach 20km/s." spin wave interferometer " described in step 3 refers to the Y type design in Fig. 2." constructive interference " refers to that spin wave amplitude superposes, and " destructive interference " refers to that spin wave amplitude is cancelled out each other." spin wave signal changes into the voltage signal that direct current can read " described in step 4 refers to and utilizes inverse Hall effect to produce direct current signal on Hall bar.
Claims (5)
1. utilize spin wave to propagate method microwave signal being converted to DC signal, it is characterized in that: its step is as follows:
Step one: utilize microwave signal generator to produce microwave signal, inspire spin wave through slab guide;
Step 2: spin wave carries out low-loss inside yttrium iron garnet YIG, high speed is propagated;
Step 3: spin wave produces " constructive interference " and " destructive interference " by spin wave interferometer;
Step 4: the voltage signal utilizing spin wave Hall effect spin wave signal to be changed into direct current to can read.
2. a kind of spin wave that utilizes according to claim 1 propagates method microwave signal being converted to DC signal, it is characterized in that: " signal generator " described in step one refers to common Commercial signal generators; " slab guide excites " is that the electromagnetic viscosimeter utilizing microwave current to produce excites the collective oscillation of spin and then produces spin wave.
3. a kind of spin wave that utilizes according to claim 1 propagates method microwave signal being converted to DC signal, it is characterized in that: " low-loss " described in step 2 refers to that spin wave is propagated quite long distance and obviously do not decay; " high speed " refers to the group velocity of spin wave.
4. a kind of spin wave that utilizes according to claim 1 propagates method microwave signal being converted to DC signal, it is characterized in that: " spin wave interferometer " described in step 3 refers to that Y type designs; " constructive interference " refers to that spin wave amplitude superposes, and " destructive interference " refers to that spin wave amplitude is cancelled out each other.
5. a kind of spin wave that utilizes according to claim 1 propagates method microwave signal being converted to DC signal, it is characterized in that: refer to " spin wave signal changes into the voltage signal that direct current can read " described in step 4 and utilize inverse Hall effect to produce direct current signal on Hall bar.
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Cited By (8)
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| CN104779342A (en) * | 2015-04-20 | 2015-07-15 | 北京航空航天大学 | Logic device based on spin wave interference and multiferroic material |
| CN105242094A (en) * | 2015-11-11 | 2016-01-13 | 电子科技大学 | FM/NM thin-film structure inverse spin hall voltage value measurement method |
| CN106100605A (en) * | 2015-04-30 | 2016-11-09 | Imec 非营利协会 | For generating and detect the Apparatus and method for of spin wave |
| CN109450555A (en) * | 2018-11-19 | 2019-03-08 | 南方科技大学 | Quantum information switch and quantum information exchange method |
| CN112002797A (en) * | 2020-08-03 | 2020-11-27 | 中国计量大学 | Electric field control spin wave logic device based on multiferroic heterojunction and control method thereof |
| CN112035390A (en) * | 2020-08-28 | 2020-12-04 | 中国科学院微电子研究所 | Data transmission device and method |
| RU2745541C1 (en) * | 2020-08-06 | 2021-03-26 | Федеральное государственное бюджетное учреждение науки Институт радиотехники и электроники им. В.А. Котельникова Российской академии наук | Electric field-controlled functional element of magnonics |
| WO2022041120A1 (en) * | 2020-08-28 | 2022-03-03 | 中国科学院微电子研究所 | Data transmission device and method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779342A (en) * | 2015-04-20 | 2015-07-15 | 北京航空航天大学 | Logic device based on spin wave interference and multiferroic material |
| CN104779342B (en) * | 2015-04-20 | 2017-08-15 | 北京航空航天大学 | A kind of logical device based on spin wave interference and multi-ferroic material |
| CN106100605A (en) * | 2015-04-30 | 2016-11-09 | Imec 非营利协会 | For generating and detect the Apparatus and method for of spin wave |
| CN105242094A (en) * | 2015-11-11 | 2016-01-13 | 电子科技大学 | FM/NM thin-film structure inverse spin hall voltage value measurement method |
| CN109450555A (en) * | 2018-11-19 | 2019-03-08 | 南方科技大学 | Quantum information switch and quantum information exchange method |
| CN109450555B (en) * | 2018-11-19 | 2020-12-15 | 南方科技大学 | Quantum information exchange device and quantum information exchange method |
| CN112002797A (en) * | 2020-08-03 | 2020-11-27 | 中国计量大学 | Electric field control spin wave logic device based on multiferroic heterojunction and control method thereof |
| CN112002797B (en) * | 2020-08-03 | 2023-04-07 | 中国计量大学 | Electric field control spin wave logic device based on multiferroic heterojunction and control method thereof |
| RU2745541C1 (en) * | 2020-08-06 | 2021-03-26 | Федеральное государственное бюджетное учреждение науки Институт радиотехники и электроники им. В.А. Котельникова Российской академии наук | Electric field-controlled functional element of magnonics |
| CN112035390A (en) * | 2020-08-28 | 2020-12-04 | 中国科学院微电子研究所 | Data transmission device and method |
| WO2022041120A1 (en) * | 2020-08-28 | 2022-03-03 | 中国科学院微电子研究所 | Data transmission device and method |
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Application publication date: 20141217 |